Fundamentals of Midwifery: A Textbook for Students (142 page)

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45%
Converting percentages to decimals
To convert a percentage to a decimal you divide by 100. This means you need to move the decimal place two spaces to the left.i.e.
32%
₃
2 .
0.32
Converting fractions to decimals
30.0.655353 053 0Fractions are like division sums. Therefore, fractions can be converted to decimals by using long division.
i.e.
Converting decimals to fractions
Probably the simplest way to convert a decimal to a fraction is to convert the decimal to a percentage and then convert the percentage to a fraction using the methods above.
Converting between units
Converting between units involves multiplying or dividing by 1000 or 1,000,000. This involves moving the decimal place 3 or 6 places to the right or left depending on the conversion (right for multiplying, left for dividing).
To convert from
Table 15.2
Conversion table for weight (g, mg and mcg)To convert tomcgmggmcg÷ 1000÷ 1,000,000mg× 1000÷ 1000g× 1,000,000× 1000
Table 15.3
Conversion table for volume (L and mL)
To convert tomL LTo convert from mL ÷ 1000L × 1000Tables 15.2 and 15.3 show what to multiply or divide by to convert between the standard units for weight (g, mg and mcg) and volume (L and mL). Below that are some example conversions.
Example 1 – 65 milligrams to micrograms
Milligrams to micrograms is x 1000 so the decimal place needs to move 3 places to the right.
339i.e.